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G. F; HUNT. CLUTCH AND STOP- I No. 537,534. Patented Apr. 16,1895

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CLUTCH AND'ST'OP. No. 537,534. W Patented Apr. 16, 1 895;

Nrrn STATES ATENT FFl'CEt CHARLES FRANCIS HUNT, OF MOLINE, ILLINOIS,ASSIGNOR TO THE WILLIAMS, WHITE (in COMPANY, OF SAME PLACE.

CLUTCH AND STOP.

SPECIFICATION forming part of Letters Patent No. 537,534, dated April16, 1895.

Application filed December 26, 1894:- Serial No. 533.008. (No model.)

To ctZZ whom it may concern.-

Be it known that I, CHARLES FRANCIS HUNT, a citizen of the UnitedStates, residing at Moline, in the county of Rock Island and State ofIllinois, have invented certain new and useful Improvements in Clutchesand Stops, of which the following is a specification.

My invention relates to a novelclutch for connecting a shaft withawheel, and also in means whereby said clutch is enabled to act as anautomatic stop for the driven or rotated member.

The invention is applicable to many classes of machinery, particularlypunching and shearing presses, in which it is desired to give to theshaft an intermittent rotation while allowing the driving wheel torotate continu ously.

For the purposes of illustration I have shown my invention as applied toa punching and shearing press, but of course do not limit myself to suchmachine.

In the drawings,Figure 1 is a side elevation of a press with myimprovements applied; Fig. 2, a view, partly in section, of'one end ofthe main shaft; Fig. 3, a transversesectional view of the shaft and itskey on the line 0c-0c of Fig. 2; Figs. 4 and 5, sectional views on theline 'yy, with the wheel partlybroken away showing the parts indifferent positions; Fig. 6, a side face view of the operating lever,and Fig. 7, a perspective view of the end of the shaft and its key.

A indicates the main frame of a punching press, and B indicates a shaftjournaled in suitable hearings in the upper part of said mainframe,--the said shaft being provided at its front or forward end withan eccentric, as is usual in this class of machines. The rear end of theshaft projects beyond the rear portion of the main frame as shown inFig. 1, and upon this projecting end is mounted loosely a band wheel 0,which is prevented from moving lengthwise of the shaft by means of acollar D secured to the outer end of the shaft and a lever E pivoted tothe frame and extending between the rear end of'the main frame and theinner face of the wheel or its hub, as clearly shown in Fig. 1. Thisleveris connected by means of a link or pitman F with a lever G pivotedto the side of the main the arc of a circle and concentric with the.

shaft, as shown in Figs. 3, 4, 5 and 7. The rear edge of the key and thecorresponding wall of the groove in the shaft are made rounding so as topermit the key or feather to oscillate and at the same time have a firmbearing throughout'its length in its seat in the shaft. The key isprovided at each end with cylindrical journals 1), one of which ismounted in the washer applied to the end of the shaft, while the otheris seated in a cylindrical hole or socket in the axle. It will benoticed upon reference to Fig. 1 that the key is of a length greaterthan that of the hub of the wheel, and that the key projects beyond theinner face'of the latter. In other words, the inner face of the keyprojects into the space between the wheel and the rear part of the mainframe of the machine, so that it may be acted upon by the lever E. Theshaft is further provided with transverse sockets c in which are mountedthe coiled springs d and the plugs or blocks 6, the construction andarrangement being such that the springs acting through the blocks, tendto throw the outer or free edge of the key outward beyond the peripheryof the shaft in order that it may'engage the shoulderfformed in the hubof the wheel.

When the parts are in the position shown in Fig. 1, the lever E is helddown upon the key by means of the WeightII, and the key is thereby heldinto its seat in the shaft, thus permitting the wheel to rotatecontinuously without effecting an engagement with and rotation of theshaft. It is of course to be understood that the weight or itsequivalent, the spring, shall exert force or pressure upon the lever Einexcess of the force exerted by the springs upon the under side of thekey.

.If the operator now places his foot upon the lever G and, overcomingthe weight, raises the lever E, the Springs (1 rock the key upon itspivots or journals and throw its edge outward into a position where itwill be engaged by the shoulder formed in the hub of the wheel. Thewheel thereupon becomes locked to the shaft, and it will remain inengagement with the shaft and rotate the latter so long as the lever Eis held up off the key. As soon as the operator removes his foot fromthe treadle, the lever will act upon the key, overcome the resistance ofthe key springs, and force the key into its seat in the shaft, therebydisconnectingthe Wheel and the shaft.

It will be noticed upon reference to Fig. 2 that the wheel has anextended bearing face along the edge of the key when the parts are inengagement, and that the thrust or strain is transmitted directly to therounded back face of the key and the correspondingly rounded face of thesocket or key-seat.

In the construction shown in the drawings it is obvious that the shaftand wheel willbe disconnected when the key reaches the upper side of theshaft, so that if the operator removes his foot from the treadle afterclutching the wheel and shaft together, the said wheel and shaft will beautomatically disconnected through or by means of the lever E, when theshaft reaches the position shown in Fig. 2. From this it will be seenthat the point in the rotation of the shaft at which the wheel and shaftare or may be disconnected and the shaft allowed to come to rest, can bevaried as desired by changing the position of the lever E and causing itto disconnect the wheel and shaft at any other point than at the upperside.

Having thus described my invention, what I claim is 1. In combinationwith a main frame; a longitudinally grooved shaft B; awheel 0 there-' onprovided with an internal shoulderf; a disk D secured to the shaft; akey I journaled at one end in the disk and at the other end in theshaft, and also seated in the groove in the shaft so that it may rock ortip to project beyond the shaft to engage the wheel; means bearingdirectly upon the body. of the key for holdingthe latter in its seat,and springs tending to throw the key out to be engaged by the wheel.

2. In combination with a main frame; a longitudinally grooved shaft B; awheel 0 thereon provided with an internal shoulderf; a disk D secured tothe shaft; a key I journaled at one end in the disk and at the other endin the shaft, and also seated in the groove in the Shaft so that it mayrock or tip to project beyond the shaft to engage the wheel; springstending to throw the key out to engage the wheel; and a lever pivoted tothe main frame between said frame and the wheel to bear upon the key.

3. In combination with a main frame; a shaft B provided with alongitudinal groove and with a cylindrical socket at one end of saidgroove; a disk secured to the end of the shaft and provided with acorresponding cylindrical socket; a key provided with cylindrical endjournals fitting in the sockets formed in the shafts and the collar, andalso resting at its rear edge in the groove in the shaft; a wheelmounted loosely upon the shaft and provided with an internal shoulder f;springs tending to throw the key outward to be engaged by the wheel; andmeans for bolding the key in its seat; the main body of said keyprojecting beyond the side of the wheel to receive the holding means.

4. In combination with a main frame; a longitudinally grooved shaft B; awheelO thereon provided with an internal shoulderf; a key I journaled atone end in the shaft and also seated in the groove in the shaft so thatit may rock or tip to project beyond the shaft to engage the wheel;means bearing directly upon the body of the key, tending to hold thelatter in its seat; and springs tending to throw the key out beyond theperiphery of the shaft to be engaged by the wheel.

In witness whereof I hereunto set my hand in the presence of twowitnesses.

CHARLES FRANCIS HUNT.

Witnesses:

HARRY AINSWORTH, JNo. J. WILLIAMS.

